/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/Operations/MeshMirror.h
class FMeshMirror
bool
bAllowBowtieVertexCreation
Whether, when welding, the creation of new bowtie vertices should be allowed (if a point lies in the mirror plane without an edge in the plane).
bool
bWeldAlongPlane
Whether, when using MirrorAndAppend, vertices on the mirror plane should be welded.
FDynamicMesh3&...
Mesh
FVector3d
PlaneNormal
FVector3d
PlaneOrigin
double
PlaneTolerance
Tolerance distance for considering a vertex to be "on the plane".